Staged oscillating diverting valve



Sept. 24, 1968 R. B. ADAMS 3,402,728

STAGED OSCILLATING DIVERTING VALVE Filed Aug. 9, 1966 3 Sheets-Sheet 2 lNVE/VTOI? ROBE/P7 B. ADAMS ATTORNEY Sept. 24, 1968 R. B. ADAMS STAGED OSCILLATING DIVERTING VALVE Filed Aug. 9, 1966 5 Sheets-Sheet 5' ATTORNEY United States Patent ice 3,402,728 STAGED OSCILLATING DIVERTING VALVE Robert B. Adams, Tredytfrin Township, Pa., assignor to Moore Products Co., Spring House, Pa., a corporation of Pennsylvania Filed Aug. 9, 1966, Ser. No. 571,263 10 Claims. (Cl. 137-815) This invention relates to a staged oscillating diverting valve and more particularly to a valve which provides alternately delivered streams of fluid.

It has heretofore been proposed to provide multi-stage oscillating valves but these have had various shortcomings. One serious difliculty with certain of the prior oscillators was that if one of the delivery passageways was blocked this would cause a feedback which interfered with the control of the oscillations.

It is the principal object of the present invention to provide a two stage oscillator in which the output of the first stage serves to control the second stage with a feedback from the second stage which is effectively isolated from the effects of downstream loading and which has a high degree of stability.

It is a further object of the present invention to provide an oscillator of the character aforesaid in which more feedback energy is available thereby overcoming losses which might otherwise interfere with the proper operation.

It is a further object of the present invention to provide a two stage oscillator with a feedback to the first stage from the second stage, the feedback take-offs being located within the interaction chamber of the second stage.

It is a further object of the present invention to provide a two stage oscillator with continuous supply of fluid under pressure to both stages, in which the major portion of the fluid flow is handled in the second stage with a much smaller flow in the first stage, the first stage controlling the second stage and the second stage having a feedback to the first stage to effect the oscillations.

It is a further object of the present invention to provide a two stage oscillator in which one stage includes a casting which serves as a support for the other stage as well as providing a convenient location for fluid passageways for the oscillator.

Other objects and advantageous features of the invention will be apparent from the description and claims.

The nature and characteristic features of the invention will be more readily understood from the following description taken in connection with the accompanying drawings forming part thereof, in which:

FIGURE 1 is a view in perspective of a two stage oscillator in accordance with the invention;

FIG. 2 is an exploded perspective view on a larger scale, of the oscillator of FIG. 1;

FIG. 3 is a horizontal sectional view, enlarged, taken approximately on the line 3--3 of FIG. 1;

FIG. 4 is a fragmentary horizontal sectional view, enlarged, taken approximately on the line 44 of FIG. 1;

FIG. 5 is a vertical sectional view taken approximately on the line 55 of FIG. 4;

FIG. 6 is a horizontal sectional view taken approximately on the line 6-6 of FIG. 2;

FIG. 7 is a view in perspective of a fluid guiding insert which may be employed; and

FIG. 8 is a diagrammatic view of the fluid circuit of the oscillator of the present invention.

It should, of course, be understood that the description and drawings herein are illustrative merely, and that various modifications and changes can be made in the 3,402,728 Patented Sept. 24, 1968 structure disclosed without departing from the spirit of the invention.

Like numerals refer to like parts throughout the several views.

The two stage oscillator in accordance with the invention preferably includes a second stage with metal castings one of which has the main fluid delivery passageways and the other of which has a fluid interaction chamber, pressure take-offs and signal transfer passage ways, and control fluid transfer passageways, and which serves as a support for the first stage. The first stage also includes a fluid interaction chamber from which fluid is supplied to control the conditions in the second stage and to whichthe feedback connections extend to control the conditions in the first stage. Each stage has a continuous pressure fluid supply which may be supplied from a common source.

Referring first to FIG. 8 of the drawings, a supply connection 10 connected to any suitable source of continuously supplied fluid under pressure is connected to a nozzle 11 for delivery of a fluid jet into a fluid interaction chamber 12. The chamber 12 has opposite diverging side walls 13 and 14, a transverse end Wall 15 with a throat 16, preferably of the same transverse dimensions as or smaller than the nozzle 11 to provide pressure gain therebeyond. Delivery passageways 17 and 18 are provided beyond the throat 16.

The opposite side walls 13 and 14 have control ports 19 and 20 for determining the direction of the jet of fluid from the nozzle 11 so that if the jet moves along the wall 13 it crosses over at the throat 16 and is delivered through the passageway 18. If the fluid jet moves along the wall 14, it is delivered through the passageway 17.

Within the chamber 12, rearwardly of the throat 16 and in the paths of flow of the deflected jet from the nozzle 11 pressure take-off or piezometer openings 22 and 23 are provided connected by fluid connections or passageways 24 and 25, through restrictions 26 and 27 if desired, to control ports 28 and 29 of a first stage fluid interaction chamber 30. Capacitances 31 and 32, such as tanks, are connected to the passageways 24 and 25 and for a three inch pipe size for the supply pipe 10, in one embodiment each has a twenty gallon capacity.

The first stage interaction chamber 30 has a supply connection 33, connected to any suitable source of continuously supplied fluid under pressure, and which advantageously may be the same source as that supplying the supply connection 10. The supply connection 33 is connected to a nozzle 34 for delivery of a fluid jet into the fluid interaction chamber 30. The chamber 30 has diverging side walls 35 and 36, and a transverse end wall 37 with a throat 38 which is preferably equal to or slightly smaller in transverse dimensions than the nozzle 34 to provide pressure gain therebeyond. The ports 28 and 29 are positioned along said side walls 35 and 36 and spaced beyond the delivery end of the nozzle 34 preferably a distance equal to or greater than the width of a nozzle 34.

The side walls 35 and 36 have the control ports 28 and 29 therein for determining, by the pressure feedback therethrough, the direction of the jet of fluid from the nozzle 34. If the jet moves along the wall 35 then the fluid is delivered through the delivery passageway 40 and thence through a passageway 42 to the control port 20. If the jet moves along the wall 36 then the fluid is delivered through the delivery passageway 39 and thence through a passageway 41 to the control port 19.

Referring now more particularly to FIGS. 1 to 7 of drawings, a second stage casting 50 is provided which has an inlet and 51 for connection to the supply of continuous pressure fluid and outlet end face 52 to which a fluid delivery casting 53 having an end face 54 is secured such as by bolts 55.

The castings 50 and 53 can be oriented and aligned by aligning pins 56 which extend into openings 57.

The casting 50 has formed therein a supply connection 110 and nozzle 111 which communicates with a second stage interaction chamber 112 having opposite diverging side walls 113 and 114 and control ports 119 and 120.

The end face 54 provides a transverse end wall for the chamber 112 and has a throat 116 with fluid delivery passageways 117 and 118 therebeyond.

On the lower or inner side of an upper wall portion 60 pressure take-off or piezometer openings 122 and 123 are provided which communicate respectively through passageways 124a and 125a with passageways 124 and 125 formed on the outer side of the wall portion 60.

Superposed on the wall portion 60, a lower cover plate 61 is provided on which is superposed a control plate 62 to provide the first stage. An upper cover plate 63 is superposed on the plate 62 with bolts 64 holding the same in assembled relation. Gaskets 65 can be interposed to prevent undesired fluid leakage.

The casting 50 has an opening 133 communicating with the supply passageway 110 and with an opening 133a in the plate 61 which communicates with a passageway 133b in the plate 62.

The plate 62 has in communication with the supply passageway 133b, a nozzle 134 for delivery of a jet of fluid into a fluid interaction chamber 130. The chamber 130 has diverging side walls 135 and 136, a transverse end wall 137 and a throat 138 in the end wall 137.

The side walls 135 and 136 have control ports 128 and 129 therein to which the fluid connections 124 and 125 are connected by fluid connections 124b and 125k in the plate 61 and fluid connections 124a and 125s in the plate 62.

The plate 62 has, beyond the throat 138, delivery passageways 139 and 140, which communicate through passageways 141a and 142a in the plate 61 and passageways 141b and 142b in the casting 50 with the ports 119 and 120.

In order to reduce turbulence at the ports 119 and 120, inserts 68 as shown in FIG. 7, can be employed. The inserts 68 each includes a tubular portion 69 with a slot 70 for alignment with the ports 119 and 120 and baflle plate 71 which straightens the flow in the passageways 139 and 140 and directs it downwardly.

In the plate 62 the passageways 124c and 125a are enlarged and respectively communicate with the passageways 124d and 125d in the plate 63 to which capacitances 31 and 32 are respectively connected by pipes.

The mode of operation will now be pointed out referring first to FIG. 8.

Fluid under pressure is supplied continuously through the supply connection 33 and through the nozzle 34 into the interaction chamber 30. Assume first that by reason of the conditions then prevailing the jet from the nozzle 34 is directed along the wall 35 and through the throat into the delivery passageway 40 and the fluid connection 42 to the control port 20.

Fluid under pressure supplied through the supply connection and through the nozzle 11 is delivered into the interaction chamber 12. With fluid supplied through the port the jet from the nozzle 11 will follow the wall 13 and pass through the throat 16 for delivery through the delivery passageway 18.

As the fluid is delivered along the wall 13, the pressure pick up 22 is effective for fluid delivery and pressure build up through the fluid connection 24 and in the capacitance 31 and when at a desired level through the control port 28 to cause the jet from the nozzle 34 to be shifted and travel along the wall 36.

The pressure in the connection 24 and capacitance 31 will then be relieved both at the port 28 and at the opening 22.

When the jet from the nozzle 34 travels along the wall 36 it passes through the throat 38 and delivery passageway 39 and through the fluid connection 41 to the control port 19. The pressure at the control port 19 causes the jet from the nozzle 11 to shift and travel along the wall 14, and through the throat 16 and to and through the delivery connection 17.

As the fluid is delivered along the wall 14, the pressure pick up 23 is effective for fluid delivery and pressure build up through the fluid connection 25, and in the capacitance 32 and when at the desired lever through the control port 29 to cause the jet from the nozzle 34 to be shifted and travel along the wall 35 as before.

The pressure in the connection 25 and capacitance 32 will then be relieved both at the port 29 and at the opening 23 while it is being built up on the other side.

The operation will continue with fluid successively .delivered through the fluid delivery connections 17 and 18. For given pressure conditions and sizes of passageways, the timing of the oscillations will be determined by the volumes which include the capacitances 31 and 32 and the setting of the restrictions 26 and 27.

The operation of the structure shown in FIGS. 1 to 7, inclusive, is substantially similar to that just described, with controlled flow conditions in the chamber 130 of fluid from the supply connection 133 through the nozzle 134 with delivery either through the passageways 139, 141a and 141k to the control port 119 or through the passageways 140, 142a and 142b to the control port 120. Feedback is effected either from the pressure take-ofl 122 through passageways 124a, 124, 124k and 1240 to the port 128 and through passageway 124d and pipe 73 to the capacitance 31, or from the pressure take-ofl 123 through the passageways a, 125, 1251) and 125c to the port 129 and through passageway 125d and pipe 74 to the capacitance 32.

In the event of blocking downstream of one of the delivery connections the oscillating action will not be interfered with, the fluid being delivered through the unblocked passageway.

It will thus be seen that apparatus has been provided for effectively carrying out the objects of the invention.

I claim:

1. An oscillating diverting valve comprising a fluid delivery stage having a fluid control chamber for two flow conditions and a fluid supply connection connected to said chamber,

said fluid delivery stage having fluid delivery connections for each of said flow conditions and control ports in said chamber for controlling the fluid delivery to said delivery stage delivery connections, a control stage having a fluid control chamber and a fluid supply connection connected to said chamber,

said control stage having fluid delivery connections and control ports in said chamber for controlling the fluid delivery to said control stage delivery connections,

fluid connections from said control stage delivery connections respectively to said delivery stage control ports,

fluid pressure pick up connections in said delivery stage fluid chamber in the fluid paths for each of said conditions,

fluid connections from each of said pick up connections respectively to one of said control stage control ports, said fluid delivery stage chamber having a throat in advance of its delivery connections, and

said pressure pick up connections being in advance of said throat.

2. An oscillating diverting valve as defined in claim 1 in which said fluid delivery stage control chamber is bounded by diverging side walls and a transverse end wall, said throat being located in said transverse end wall.

3. An oscillating diverting valve as defined in claim 1 in which said control stage control chamber is bounded by diverging side walls, said control ports for said control chamber being located along said side walls downstream of said fluid supply connection. 4. An oscillating diverting valve as defined in claim 1 in which said supply connections are connected to a common source of fluid. 5. An oscillating diverting valve as defined in claim 1 in which said last fluid connections have delay devices therein. 6. An oscillating diverting valve as defined in claim 2 in which said fluid delivery stage includes connected body portions, one of said body portions has said fluid control chamber therein, and another of said body portions has said fluid delivery connections therein and provides said transverse end wall. 7 An oscillating diverting valve as defined in claim 1 in which said control stage control chamber has a throat at its discharge end, said throat being no larger than the fluid supply connection to said chamber. 8. An oscillating diverting valve as defined in claim 1 in which said fluid delivery stage control chamber has a throat at its discharge end,

said throat being no larger than the fluid supply connection to said chamber. 9. An oscillating diverting valve defined in claim 1 in which said fluid delivery stage has a body portion with its control chamber thereon, said body portion has a boundary wall for said control chamber, said control chamber has a throat at one end, and said body portion has said fluid pressure pick up connections on said boundary Wall in advance of said throat. 10. An oscillating diverting valve as defined in claim 1 in which said fluid connections from said control stage delivery connections to said delivery stage control ports have turbulence reducing members interposed therein.

References Cited UNITED STATES PATENTS 3,016,063 1/ 1962 Hausmann 137-81.5 3,171,421 3/1965 Joesting 13781.5 3,171,422 3/1965 Evans 137-815 3,219,271 11/1965 Bauer 235201 3,223,101 12/1965 BOWles 137--81.5 3,279,531 10/ 1966 Bowles.

SAMUEL SCOTT, Primary Examiner. 

1. AN OSCILLATION DIVERTING VALVE COMPRISING A FLUID DELIVERY STAGE HAVING A FLUID CONTROL CHAMBER FOR TWO FLOW CONDITIONS AND A FLUID SUPPLY CONNECTION CONNECTED TO SAID CHAMBER, SAID FLUID DELIVERY STAGE HAVING FLUID DELIVERY CONNECTIONS FOR EACH SAID CHAMBER FOR CONTROLLING THE FLUID PORTS IN SAID CHAMBER FOR CONTROLLING THE FLUID DELIVERY TO SAID DELIVERY STAGE DELIVERY CONNECTIONS, A CONTROL STAGE HAVING A FLUID CONTROL CHAMBER AND A FLUID SUPPLY CONNECTION CONNECTED TO SAID CHAMBER, SAID CONTROL STAGE HAVING FLUID DELIVERY CONNECTIONS AND CONTROL PORTS IN SAID CHAMBER FOR CONTROLLING THE FLUID DELIVERY TO SAID CONTROL STAGE DELIVERY CONNECTIONS, FLUID CONNECTIONS FROM SAID CONTROL STAGE DELIVERY CONNECTIONS RESPECTIVELY TO SAID DELIVERY STAGE CONTROL PORTS, FLUID PRESSURE PICK UP CONNECTIONS IN SAID DELIVERY STAGE FLUID CHAMBER IN THE FLUID FOR EACH OF SAID CONDITIONS, 